On a tour to premiere a new film on climate change, multi-billionaire and presidential hopeful Michael Bloomberg made three stops this week: New York, London, and Iowa.

The film, titled “Paris to Pittsburg,” is a response to President Trump’s plans to pull out of the 2016 Paris Climate Agreement. It features the efforts of individuals who have taken it upon themselves to fight climate change in the absence of government urgency. Iowans Dan and Faith Lutat of the Iowa Lakes Community College are featured as faces of the college’s wind turbine and energy technology program.

Bloomberg chose to visit Des Moines Tuesday in part to recognize the state’s efforts in renewable energy. He wrote in a Des Moines Register Guest column, “Iowans understand what too many leaders in Washington don’t: Fighting climate change is good for our health and our economy. ” According to him, if every state installed as much wind power as Iowa, the offset carbon emissions would almost bring the U.S. to its Paris Agreement goals for 2025.

He also visited the swing-state to test the waters for a potential run for presidency in 2020. Throughout the day he visited different parts of the state to talk renewable energy and gun control. Well aware of Bloomberg’s political motive, Left-wing protestors joined the screening audience to question the environmentalist’s stance on social issues such as stop-and-frisk policing and his own billionaire status.

Bloomberg Philanthropies produced the film in partnership with award-winning company Radical Media, and National Geographic will officially broadcast it Dec. 12.